Question about a fighters "prime" / "past his best"

[THE THIRD MAN]

No matter what the excuses are Oscar was shot, spent, old and tired against Pacquiao. It was a tragedy unfolding before my eyes watching De la hoya humiliate himself in the ring. "prime"/"past his best" we saw the best example ever as the career of Oscar De La Hoya went down the poo shooter.
He got old against Forbes and was a grandfather by this fight.

[Fenster]

No matter what the excuses are Oscar was shot, spent, old and tired against Pacquiao. It was a tragedy unfolding before my eyes watching De la hoya humiliate himself in the ring. "prime"/"past his best" we saw the best example ever as the career of Oscar De La Hoya went down the poo shooter.
He got old against Forbes and was a grandfather by this fight.

I agree entirely.

Remember though, Oscar was already considered "past his best" (as your Forbes comment highlights) and was not P4P ranked by anyone (apart from the divs at Sky Sports).